Salut to Romania. The only sure way to know is with a biopsy. But there are tests that can be taken before that, to see if a biopsy is warranted. Maybe a CBC then a scan such as ultrasound or CT or MRI (in increasing order of expense).
If this all happened very quickly, in 3 weeks, then it's less likely to be lymphoma.
I wouldn't delay in seeing a doc. They'll likely begin by assessing the size, firmness, shape and movability, and also presence or not of pain in the nodes. Those things are indications but can't tell for certain - but that's a start. Good luck to you.
Copyright 1994-2017MedHelp International.All rights reserved. MedHelp is a division of Aptus Health.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.